High or low water alarm



(No Model.)

H. F. COOK.

HIGH 0R LOW WATER ALARM.

No. 558,161. Patented Apr. 14, 1896.

I z/ulewr/y, v

AN DREW BBRAHAM PHOTO LMQWASMNGTONJ C UN IT'ED STATES PATENT OFFICE.

HERBERT EOOOK, OF CLEVELAND, OHIO;

HIGH OR LOW WATER ALARM.

SPECIFICATION forming part of Letters Patent No. 558,161, dated April14, 1896.

Application filed January 6, 1896- To all whom it may concern.-

Be it known that I, HERBERT F. COOK, a citizen of the United States,residing at Oleveland, in the county of Ouyahoga and State of Ohio, haveinvented certain new and useful Improvements in High or Low WaterAlarms; and I do hereby declare the following to be a full, clear andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

My invention relates to an improvement in high and low water alarms forsteam-boilers.

The object of the invention is to providea simple and inexpensive butthoroughly effective device of this character; and the inventionconsists in theconstruction and com bination of parts hereinafterdescribed and claimed.

In the drawings, Figure 1 is a central vertical sectional view of myimproved device, and Fig. 2 is a horizontal section on line 2 2.

Referring to the parts by letter, A represents the watencolumn chamber,which is connected at two pointsviz. below the lowwater level by thepipe at and above the highwater level by the pipe a. The water in thiscolumn will therefore be at the same level as it is in the boiler. Atone side of the chamber A is an enlargement a in which is contained apart of the alarm mechanism.

B represents a float contained in the chamher A. A stemb is secured tothe float, and on the stem are two shoulders b 12 near the upper andlower ends, respectively.

0 represents a valve which is adapted to close the opening 0, whichconnects the interior of the chamber A with the whistle G. This valve isa long rod having a tapered end 0, which fits the tapered valve-seat 0The upper and lower ends of this valve lie and move in theguiding-sockets 0, 00 111 the plugs a a, which are inserted in the upperand lower offset-walls of the casing of the watercolumn chamber.

F represents a weighted arm pivoted to the fixed bracket f, and its endis forked and engages with the horizontal pin 0 on the valve. The objectof the weighted arm is to hold the valve closed; but any other wellknown Serial No. 574,536. (No model.)

mechanism, as a spring, might be substituted therefor.

D represents a lever pivoted to a fixed bracket cl, which in theconstruction shown is formed on the inner face of the tightly-fittingplug cl. This lever is forked near one end and the valve 0 passesbetween the forks. The other end of the lever is provided with a hole 01through which the float-stem 7) passes loosely.

E E represent two links, which are pivoted to the lever D on oppositesides of the valve. One link extends upward and the other downward, andthey are provided with approximately horizontal ends 6 e. In these endsthe holes 6 e are formed, and the valve C passes loosely through saidholes. On the valve are the two shoulders 0 0 with which the ends of thelinks will engage when the lever D is rocked.

When the water in the boiler reaches the high limit of safety, thefloat, has risen until the shoulder b thereon moves the lever D upward.This causes the link E to strike the shoulder o and open the valve.WVhen the water reaches the low safety-level, the float has moved downuntil the upper shoulder b on the stem 19 strikes the lever D. Therocking of said lever draws the link E against the shoulder c and opensthe valve.

Having described my invention, I claim 1. In ahigh and low water alarm,the combination of a water-column chamber adapted to be connected with asteam-boiler, a float in said chamber, having a stem which is providedwith two shoulders, with an alarmwhistle, a self-closing valve for theport which connects the whistle and water-column chamber, two shoulderson said valve, a pivoted lever which projects into the path of theshoulders on the float-stem, and two links which are pivoted to saidlever and are adapted to engage respectively with said shoulders on thevalve when the lever is rocked, substantially as and for the purposespecified.

2. In a water-alarm, the combination of a water-column chamber adaptedto be connected with a steam-boiler, a float in said chamber, and afloat-stem having two shoulders, with an alarm-whistle, a self-closingvalve for the port which connects the whistle loosely, substantially asand for the purpose with said chamber, two shoulders on said specified.10 valve, a pivoted lever which projects into the In testimony whereof Iaffix my signature path of the two shoulders 0n the float-stem, inpresence of two witnesses.

5 two links pivoted to said lever, extending re- HERBERT F. COOK.

spectively upward and downward therefrom lVitnesses: and havingapproximately horizontal perfo- E. L. THURSTON, rated ends through whichsaid valve passes L. F. GRISWOLD.

